Graphitized recarburizer: The composition is generally C: 98-99.5%, S0.03-0.05% is more, and the absorption rate is more than 90-95%. Carbon fiber spun pitch
Advantages: The graphitization recarburizer undergoes high-temperature treatment and graphitization. At a high temperature of 3000 ℃, the shape of the carbon molecules changes from an irregular arrangement to a hexagonal uniform arrangement. The fixed carbon content is high, the absorption rate is high, and there are few impurities, so this graphite structure is easy to decompose in the molten steel.
Petroleum coke recarburizer
Disadvantages: The price is relatively high, and domestic steel manufacturers use less, but they will use it when smelting high-quality steel. High-quality petroleum coke recarburizer
Improve the thermal and electrical conductivity of the material;
2. Improve the thermal stability, thermal shock resistance and chemical stability of the material;
3. Improve the lubrication performance and wear resistance of the material;
4. Discharge the impurities in the material and improve the purity;
5. Reduce the hardness of the material to facilitate machining.
Artificial graphite has better circulation than natural graphite. Natural graphite has a higher capacity. Due to poor circulation, the choice of electrolyte is more important. Natural graphite is relatively soft, but the particles may be deformed if compacted too high, and the liquid absorption capacity will drop sharply.
Natural graphite has high compaction density and high gram capacity, generally above 350mAh/g; good processing performance; but under the same compaction density conditions, the cycle performance is slightly worse, the low temperature performance and the rate performance are slightly worse. Artificial graphite has good cycle performance, high and low temperature performance, but has low compaction density and low gram capacity, generally 325-350mAh/g. Processing performance is slightly worse.